Posted on: Jan 3 2015, 08:23 PM | |
Newbie Group: Members Posts: 5 Joined: 1-August 11 Member No.: 6092 |
Very nice animation. Much better then ESA original. Thanks for creating and sharing. |
Forum: Rosetta · Post Preview: #216733 · Replies: 390 · Views: 409062 |
Posted on: Nov 26 2014, 09:55 AM | |
Newbie Group: Members Posts: 5 Joined: 1-August 11 Member No.: 6092 |
Brian, your simulation is very interesting, very nice and very promising. I think that you can quietly adjust the direction of the initial vector, because we do not know it well enough. I suppose that impact points then can be very close to the yellow area from the CONSERT measurements. How high are the jumps? From the picture I estimate less than 500 meters, which would be consistent with my expectations. |
Forum: Rosetta · Post Preview: #215779 · Replies: 1412 · Views: 1130564 |
Posted on: Nov 20 2014, 08:08 AM | |
Newbie Group: Members Posts: 5 Joined: 1-August 11 Member No.: 6092 |
... when i calculated it i got this value for the first touchdown location : 0.00159m/s2 Could it be right? My rough calculations result to the value at about 0.00016 m/s2 (about 10 times smaller then your result, Malmer). My calculation is based only on the known mass (1x10^13 kg) and approximated radius (2 km). I agree with fredk, that simulation must produce good Rosetta orbital parameters (for example about 8 days of orbital period at 20 km circular distance from center of the comet [or about 0.18 m/s orbital speed at same distance]). |
Forum: Rosetta · Post Preview: #215553 · Replies: 1412 · Views: 1130564 |
Posted on: Nov 18 2014, 09:53 PM | |
Newbie Group: Members Posts: 5 Joined: 1-August 11 Member No.: 6092 |
IMHO the axis of rotation in the Brian's video corresponds well to the ESA model. |
Forum: Rosetta · Post Preview: #215494 · Replies: 1412 · Views: 1130564 |
Posted on: Nov 18 2014, 12:08 PM | |
Newbie Group: Members Posts: 5 Joined: 1-August 11 Member No.: 6092 |
Very nice simulation, Malmer. If you do gravity simulation, please take into account that the Philae apparently "jumped" roughly in similar direction as the rotation of the comet, so it had more than half of the "orbital speed". So it was more at "suborbital trajectory" than at pure "gravity jump". IMHO centrifugal force has influenced force vectors acting on Philae. According to your simulation, Philae jumped roughly in the same direction, which flew in and (first) landed on a comet? |
Forum: Rosetta · Post Preview: #215481 · Replies: 1412 · Views: 1130564 |
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